
public class Point {
	private final double _x;
    private final double _y;
    private final double _z;
    
    public Point(double x, double y, double z) {
        _x = x;
        _y = y;
        _z = z;
    }
    public Point() {
        this(0, 0, 0);
    }
    
    public double getX() {
        return _x;
    }
    public double getY() {
        return _y;
    }
    public double getZ() {
        return _z;
    }
}
